*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001010
Feb001034
Mar007007
Apr01536200377
May29374457009833
Jun7204002630020670
Jul3173811988009400
Aug1051017001032
Sep031825001828
Oct1360100605
Nov01150016
Dec001003646
Total5137182654604943828